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what I would probably do is do a cluster extent correction, like rft, and then just report it as .05 corrected. Otherwise, it is essentially a p value of 0, which may sound kind of fishy. you should probably report the fvalue and df too if you go that route. Cheers, Michael On Tue, Mar 1, 2011 at 9:02 PM, Anna McCarrey <[log in to unmask]>wrote: > Ah thank you – do you know how best to report inf ? > > > > My df were 1,64 (I have four conditions within the task), but in the first > place, just want to report task > baseline response. > > > > Cheers, > > Anna > > > > *From:* [log in to unmask] [mailto:[log in to unmask]] > *On Behalf Of *Michael T Rubens > *Sent:* Wednesday, 2 March 2011 3:54 PM > *To:* Anna McCarrey; spm > > *Subject:* Re: [SPM] z values > > > > yes that is what it means, I thought you were asking what was causing it. > what were your degrees of freedom? > > > > Cheers, > > Michael > > On Tue, Mar 1, 2011 at 8:29 PM, Anna McCarrey <[log in to unmask]> > wrote: > > Hi Michael thanks for your quick reponse. I was doing a simple condition > > baseline comparison. I only get 'Inf' for the really large F values like > > 100. But the smaller F values report a z stat. > > I thought it might mean infinite ??! > > > -----Original Message----- > From: [log in to unmask] [mailto:[log in to unmask]] > On Behalf Of Michael T Rubens > Sent: Wednesday, 2 March 2011 2:58 PM > To: Anna McCarrey > Cc: [log in to unmask] > Subject: Re: [SPM] z values > > that probably means that something is not right. What analysis were > you doing? for instance, if you were doing a permutation test, it > could be that you didn't perform enough iterations to resolve the > significance. > > Cheers, > Michael > > On Tue, Mar 1, 2011 at 7:50 PM, Anna McCarrey <[log in to unmask]> > wrote: > > Hi SPM experts, > > > > in whole brain analyses in fMRI, when the Z value is Inf, what does this > mean and how do I report this? > > > > Many thanks in advance. > > > > Anna > > > > > > -- > Research Associate > Gazzaley Lab > Department of Neurology > University of California, San Francisco > > > > > -- > Research Associate > Gazzaley Lab > Department of Neurology > University of California, San Francisco > -- Research Associate Gazzaley Lab Department of Neurology University of California, San Francisco